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-rwxr-xr-xgenlibtokenlookup.py185
1 files changed, 185 insertions, 0 deletions
diff --git a/genlibtokenlookup.py b/genlibtokenlookup.py
new file mode 100755
index 0000000..cd6163f
--- /dev/null
+++ b/genlibtokenlookup.py
@@ -0,0 +1,185 @@
+#!/usr/bin/env python
+
+HEADERS = [
+ (':authority', 0),
+ (':path', 1),
+ ('age', 2),
+ ('content-disposition', 3),
+ ('content-length', 4),
+ ('cookie', 5),
+ ('date', 6),
+ ('etag', 7),
+ ('if-modified-since', 8),
+ ('if-none-match', 9),
+ ('last-modified', 10),
+ ('link', 11),
+ ('location', 12),
+ ('referer', 13),
+ ('set-cookie', 14),
+ (':method', 15),
+ (':method', 16),
+ (':method', 17),
+ (':method', 18),
+ (':method', 19),
+ (':method', 20),
+ (':method', 21),
+ (':scheme', 22),
+ (':scheme', 23),
+ (':status', 24),
+ (':status', 25),
+ (':status', 26),
+ (':status', 27),
+ (':status', 28),
+ ('accept', 29),
+ ('accept', 30),
+ ('accept-encoding', 31),
+ ('accept-ranges', 32),
+ ('access-control-allow-headers', 33),
+ ('access-control-allow-headers', 34),
+ ('access-control-allow-origin', 35),
+ ('cache-control', 36),
+ ('cache-control', 37),
+ ('cache-control', 38),
+ ('cache-control', 39),
+ ('cache-control', 40),
+ ('cache-control', 41),
+ ('content-encoding', 42),
+ ('content-encoding', 43),
+ ('content-type', 44),
+ ('content-type', 45),
+ ('content-type', 46),
+ ('content-type', 47),
+ ('content-type', 48),
+ ('content-type', 49),
+ ('content-type', 50),
+ ('content-type', 51),
+ ('content-type', 52),
+ ('content-type', 53),
+ ('content-type', 54),
+ ('range', 55),
+ ('strict-transport-security', 56),
+ ('strict-transport-security', 57),
+ ('strict-transport-security', 58),
+ ('vary', 59),
+ ('vary', 60),
+ ('x-content-type-options', 61),
+ ('x-xss-protection', 62),
+ (':status', 63),
+ (':status', 64),
+ (':status', 65),
+ (':status', 66),
+ (':status', 67),
+ (':status', 68),
+ (':status', 69),
+ (':status', 70),
+ (':status', 71),
+ ('accept-language', 72),
+ ('access-control-allow-credentials', 73),
+ ('access-control-allow-credentials', 74),
+ ('access-control-allow-headers', 75),
+ ('access-control-allow-methods', 76),
+ ('access-control-allow-methods', 77),
+ ('access-control-allow-methods', 78),
+ ('access-control-expose-headers', 79),
+ ('access-control-request-headers', 80),
+ ('access-control-request-method', 81),
+ ('access-control-request-method', 82),
+ ('alt-svc', 83),
+ ('authorization', 84),
+ ('content-security-policy', 85),
+ ('early-data', 86),
+ ('expect-ct', 87),
+ ('forwarded', 88),
+ ('if-range', 89),
+ ('origin', 90),
+ ('purpose', 91),
+ ('server', 92),
+ ('timing-allow-origin', 93),
+ ('upgrade-insecure-requests', 94),
+ ('user-agent', 95),
+ ('x-forwarded-for', 96),
+ ('x-frame-options', 97),
+ ('x-frame-options', 98),
+ # Additional header fields for HTTP messaging validation
+ ('host', None),
+ ('connection', None),
+ ('keep-alive', None),
+ ('proxy-connection', None),
+ ('transfer-encoding', None),
+ ('upgrade', None),
+ ('te', None),
+ (':protocol', None),
+ ('priority', None),
+]
+
+def to_enum_hd(k):
+ res = 'NGHTTP3_QPACK_TOKEN_'
+ for c in k.upper():
+ if c == ':' or c == '-':
+ res += '_'
+ continue
+ res += c
+ return res
+
+def build_header(headers):
+ res = {}
+ for k, _ in headers:
+ size = len(k)
+ if size not in res:
+ res[size] = {}
+ ent = res[size]
+ c = k[-1]
+ if c not in ent:
+ ent[c] = []
+ if k not in ent[c]:
+ ent[c].append(k)
+
+ return res
+
+def gen_enum():
+ name = ''
+ print 'typedef enum {'
+ for k, token in HEADERS:
+ if token is None:
+ print ' {},'.format(to_enum_hd(k))
+ else:
+ if name != k:
+ name = k
+ print ' {} = {},'.format(to_enum_hd(k), token)
+ print '} nghttp3_qpack_token;'
+
+def gen_index_header():
+ print '''\
+static int32_t lookup_token(const uint8_t *name, size_t namelen) {
+ switch (namelen) {'''
+ b = build_header(HEADERS)
+ for size in sorted(b.keys()):
+ ents = b[size]
+ print '''\
+ case {}:'''.format(size)
+ print '''\
+ switch (name[{}]) {{'''.format(size - 1)
+ for c in sorted(ents.keys()):
+ headers = sorted(ents[c])
+ print '''\
+ case '{}':'''.format(c)
+ for k in headers:
+ print '''\
+ if (memeq("{}", name, {})) {{
+ return {};
+ }}'''.format(k[:-1], size - 1, to_enum_hd(k))
+ print '''\
+ break;'''
+ print '''\
+ }
+ break;'''
+ print '''\
+ }
+ return -1;
+}'''
+
+if __name__ == '__main__':
+ print '''/* Don't use nghttp3_qpack_token below. Use mkstatichdtbl.py instead */'''
+ gen_enum()
+ print ''
+ gen_index_header()